I just picked up a Sigma 16mm f2.8 from a list member (thanks Paul).
One of the internal filters is marked LB-180. I know that this is a
tungsten to daylight filter. I am curious if anyone knows the strength of
correction. I made a guess that the 180 might refer to the mired value
which would be an 80A + an 82C. Viewing a bright source and shifting the LB
filter into place seems to drop the meter 2 stops which would indicate an
80A strength not an 80A + 82C (2 and 2/3rd). Anyone got insight? It
probably is 80A, just curious.
And no snickering from the digital gallery with auto white balance. We be
talkin' film user here.
Jay - keeping Kodak going, 1 roll at a time.
Hand me my costume
Please won't you pass me my mask
I have appointments I must keep with my past.
Bill Nelson - Beauty Secrets
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